Safety pulley



Nov. 29, 1949 R. SHERRY 2,489,679

SAFETY PULLEY Filed Sept. 25, 1945 3O INVENTOR ROBERT SHERRY ATTORNEY Patented Nov. 29, 1,949

"PKTENT OFFICE j SAFETY :PULLEY R6beIt Sh'eI'rK- EQX' Roekaway, N. Y. Apin'lica'tion September--25, 1945,, Serial No..61 8,453

' r r "6Claims. (Cl. 2'54-'-=195) :31 This invention "relates to'newand useful-impr'ovements in pulleys and has-"morema'rticul-ar reference to a safety pulley.

The new and improved-"pulley is," characterized by a hat body having-a -circular'op'eningextending 'inwardsfrom one "face. A stud projects from thebase wall of this opening. it is proposed to "mount a flat pulleyrotatively on said-stud inza manner so that "its outeriaceis flush with the'face of "said fiat body -andserves to close said opening. It is proposed thatthe'body be formed with passages extending inwards 'from 'its edges for a cord-"orcable to passoversaidpulley. The invention "contemplates the "provision of "a transverse support =member mounted across the edge portion of said flat body =bywhich-said safety pulley may be mounted 'on' various objects. The invention also contemplates a modi'fication in which it-is possible to shift'the'transverse'support member to various positionsso astosuppdrtf-ZO the fiatbody in variouspositions.

Still -further the invention proposesan im4 proved safetypulley; as briefly -'exp1ained,which may be manufactured-and sold' at a reasonable cost.

"For further comprehension'of the-invention, and of the objects and advantages thereof,*rterence will'be had to thefollowing description; and accompanying drawings, and to the appendopening"! I. nanatmfiniy mv is rlotatively. mounted orilthe stud il 2 and has.a'f1at. outer face I 5 which is'fjflush withthe. Qutef-faceof ithe'fiat bodyil lltand .thestud l2 andserves tojjcloselthe. opening lc l.

"iIhe cable or' cord is recessed within'the .circiflzr opening" I I so thatij'the -calr' le does. not, protrude beyond the outer ,peripheryofthe opening LI I but lies flush 'or belowxtheinner, surface; of thevbody,

rests against a shoulder?! 6" formed upon" theibase wall ofthe opening- .LI This cuts down the'ifrictional resistance ofthefpuHeyswthat it may'itu'rn :ea'sily. 'A,.'washer?"18'andp'screw' l9 serve'to. re-

leas'abiy supportthe pulley I4 in position onthe stud' l2. The flatflqody l0 is"'formed'withijpas sages 2 U-and 2 liejxtendingdnwards from its edges for a-cord*or--cabie""-topass"through; for engaging around the pulley l4.

ktransverse support ,men'iber"22 is. mounted acrossanedgeyportion oftheflatbody I 0 by which .the' safety piilley may be conveniently mounted on a flat, or other shaped object. This transverse supqo'ort member i2-isformed with apertures 23 through which-fastening elements may-engage. The -suppo'rt member 22 is *reinforced with ribs formed along itsedge portions.

oper'ation and-mse of "the new -"andimproved 'sa:ety*-pu1leymay* be understood -from the ed claims in which the various novel -ieatures o'f 110W g! line 5+5 of Fig.4. s40

6 is a: transverse vertical*isectional view taken on the line 6 -;=6.:of?Figs3.

Fig. 7 is a planvievw similar:to' Fig; =-2 but illustrating asafetyzpulley constructed-sin accordance with-a modified iorm 'ofzxzthis invention.

fFig. 8Iis a- 'sidezelevationalizview-iof the- -pulley shown-in Fig. '7.

Fig. 9. is: a' back: view: ofaithe :pulley' lookingin the direction of :the-line'9-9:of -Fig.i8.

safety-pulley is' 'first-mounted upon a body by engagingfastening elementsthrough the-aperture 23. The cord, or cable is-then threaid'efd through-thepassages 1 2ll= and 2 I in order to slip 2..35 itaround the -pulley l4, -'--The pulley isnow ready for use. It ispossiblefif desired, to arrange these pulleys in-pairs; ordn serie's inorder to change-the directionof the c'a'ble' =-orcord from-= a horizontal to a vertical positionyand vice-versa.

Figs.*7ito 9, -inolusive,= amodified form or the invention has been *disclosed which-is very similar to the prior form "distinguishing merely in Sthe fact that -the pulley is provided with a transversei support member 30"adjusted to positions upon the flat' -body 3l-=of the pulley. 'More specifically; the support member w is formed with sections-= 32 and 3 which are hingedly connected together by-a hmgeimin' f 34. "Thesesections 32 and extend to the Tightand left hand of "the ancevwith the-form ofthe inventioniillustrated in i Fi slac-- 6, inclusive,"includes aiasubstantially 1 flat-.-body 10 z-havingiaacircu'lar iopening ilIsextending inwards from: oneizface. ,iiArstud [2 pmtures 35 fori' fastening elements -by which it may be-- =a'ttached:u-pon+a 'flator' bther object. The support-smember 'dll alsmprovided-withribs 36 extending along --its edge portions. The "inner In other respects this form of the invention is identical to the prior form and like parts may be recognized by the same reference numerals.

The operation and use of this form of the invention is substantially identical to the prior form. However, it distinguishes in the fact that when the safety pulley is mounted upon a flat object, the transverse support member 30 will be in a position in which the pegs 3? engage certain of the apertures 38. When desired, the fastening elements which hold the support member 3%) are removed sothat the sections 32 and 33 of the member 39 may be bent relative to each other to disengage the pegs 3! from the apertures 33. Now it is possible to move the support member 30 along the edge portion of the flat body 3! to a new position. In a new selected position, the pegs 3? are. engaged with different ones of the apertures 38. Now the pulley may be mounted on some object so that the sections 32 and 33of the support member 36 are located in positions in which the pegs 31 engage the new apertures'38.

A feature of the second form of the invention:

resides in the fact that the fiat body 3i may be adjusted in relation to the support member 30 so that the passages 23 and 2!, through which the cord or cable passes, are directed in selected directions.

It is to be understood that the pulley l4 may be, rotated on suitable ball bearings or thrust. bearings to reduce the amount of friction in the device.

While I have illustrated-and described the pre-- ferred embodiments of my invention, it is to be understood that I do not limit myself to the precise constructions herein disclosed and the right.

is reserved to all changes and modifications coming Within the scope of the invention as defined I in the appended claims.

Having thus described my invention, what I claim as new, and desire to secure by United States Letter Patent is:

1. A safety pulley, comprising a substantially flat body having a circular opening extending inwards from one face, a stud projecting coaxially of and from the base wall of said opening, a flat pulley rotatively mounted on said studand have ing a flat outer face flush withthe face of said flat body and serving to close said opening, said body having passages extendinginwards from its edges for a cord to pass over said pulley, a transi the faces of said flat body when said sections are in a common plane, and pegs projecting from said shoulders and engaging certain of a series of apertures extending along the facesof said fiat 1' body, whereby the position of said support member may be changed by engaging said pegsin different groups of said apertures.

4 flat body having a circular opening extending inwards from one face, a stud projecting coaxially of and from the base wall of said opening, a flat pulley rotatively mounted on said stud and having a flat outer face flush with the face of said fiat body and serving to close said opening, said body having passages extending inwards from its edges for a cord to pass over said pulley, a transverse support member mounted across an edge portion of said fiat body, and consisting of right and left hand sections hingedly connected together adjacent the edge portion of said flat body,

'said support member having shoulders engaging the faces of said flat body when said sections are in a common plane, and pegs projecting from said shoulders and engaging certain of a series of apertures extending along the faces of said fiat body, whereby the position of said support member may be changed by engaging said pegs in different groups of apertures, said apertures being extended along the edge portion of said fiat body.

3. A safety pulley comprising a substantially,

tively mounted on said stud and having a flatouter face flush with the face of said flat body;

and serving to close said opening, said body hav-f ing passages extending inwardly from its edges fora cord to pass over said pulley, support means;- mounted across an edge portion of said flat body, and consisting of hingedly connected sections; said means having shoulders engaging the faces of said flat body when said sections are in a com-. mon plane, and further means projecting from' I said shoulders and engaging certain of a series of apertures extending along the faces of said flat. body, whereby the position of said first-mentionedmeans may be changed by alternate engagementof said second-mentioned means in different groups of said apertures.

4. In a pulley having a fiat body rotativelysupporting a pulley member and formed with passages offset from each other and through T which a cord passes to extend over the pulley, means for adjustably supporting the body to vary;

the direction of the passages, comprising a supsaid support member and having their adjacent ends abutting the faces of the body, the faces of the body being formed with spaced apertures, and pegs projecting from the said free ends of said ribsandiengaging certain of said apertures,

whereby said sections of said support member may be pivoted relative to each other in one direction to disengage said pegs from said apertures freeing the body to be shifted to align different apertures with said pegs after which said 1' sections maybe pivoted relative to each other in the opposite direction to engage the pegs wit the apertures now aligned therewith.

5. In a pulley having a flat body rotatively supporting a pulley member and formed with passages offset from each other and through which a cord passes to extend over the pulley/ means for adjustably supporting the body to vary the direction of the passages, comprising a 'sup- 5 port member having separate sections hingedly connected together with their free ends extending beyond opposite sides of the body, ribs '5 formed on the top and bottom edges of the sec Y tions of said support member and having their adjacent ends abutting the faces of the bodyfi l the faces of the body being formed with spaced apertures, and pegs projecting from the said free ends of said ribs and engaging certain of said apertures, whereby said sections of said support member may be pivoted relative to each other in one direction to disengage said pegs from said apertures freeing the body to be shifted to align different apertures with said pegs after which said sections may be pivoted relative to each other in the opposite direction to engage the pegs with the apertures now aligned therewith, said sections of said support member being formed with apertures through which fastening elements can be passed for securing said sections against being pivoted relative to each other.

6. In a pulley having a flat body rotatively supporting a pulley member and formed with passages offset from each other and through which a cord passes to extend over the pulley, means for adjustably supporting the body to vary the direction of the passages, comprising a support member having separate sections hingedly connected together with their free ends extending beyond opposite sides of the body, ribs formed on the top and bottom edges of the sections of said support member and having their adjacent ends abutting the faces of the body, the faces of the body being formed with spaced apertures, and pegs projecting from the said free ends of said ribs and engaging certain of said apertures, whereby said sections of said support member may be pivoted relative to each other in one direction to disengage said pegs from said apertures freeing the body to be shifted to align different apertures with said pegs after which said sections may be pivoted relative to each other in the opposite direction to engage the pegs with the apertures now aligned therewith, the body being substantially circular and said apertures being arranged in aligned pairs and in arcuate lines concentric with the center of the body. ROBERT SHERRY.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 125,419 Strafiin Apr. 9, 1872 695,381 Dutton Mar. 11, 1902 1,634,772 Coventry July 5, 1927 1,635,145 Taylor July 5, 1927 1,896,266 White Feb. 7, 1933 

